Encode or decode text using Base62 alphanumeric encoding

Convert bytes or integers to and from a case-sensitive Base62 token.

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ToolBase62 Encode/Decode
Input
Output
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Preview

How it works

Values are repeatedly divided by 62 and reassembled from a fixed 62-character alphabet; decoding multiplies an accumulator by 62 for each character. A separate convention is needed to preserve leading zero bytes.

  • Letters and digits avoid punctuation.
  • Alphabet order must remain fixed.

Worked example

Encode Text
Encode a string using Base62 for URL-friendly output
Input
											Hello
Output
												5TP3P3v

When to use this

Short URLs, compact identifiers, and storage tokens use Base62.

Edge cases

  • Lowercasing changes the token.
  • Leading zero bytes disappear without a length convention.
  • Duplicate alphabet characters make decoding ambiguous.